irecovery: Return an error if no action option was used

1 files changed, 8 insertions, 1 deletions

diff --git a/tools/irecovery.c b/tools/irecovery.c
index c32a7f9..48a69f6 100644
--- a/tools/irecovery.c
+++ b/tools/irecovery.c
@@ -43,6 +43,7 @@
 #define debug(...) if(verbose) fprintf(stderr, __VA_ARGS__)
 
 enum {
+        kNoAction,
         kResetDevice,
         kStartShell,
         kSendCommand,
@@ -377,7 +378,7 @@ static void print_usage(int argc, char **argv) {
 int main(int argc, char* argv[]) {
         int i = 0;
         int opt = 0;
-        int action = 0;
+        int action = kNoAction;
         unsigned long long ecid = 0;
         int mode = -1;
         char* argument = NULL;
@@ -461,6 +462,12 @@ int main(int argc, char* argv[]) {
                 }
         }
 
+        if (action == kNoAction) {
+                fprintf(stderr, "ERROR: Missing action option\n");
+                print_usage(argc, argv);
+                return -1;
+        }
+
         if (verbose)
                 irecv_set_debug_level(verbose);